/**** * Plugins ****/ var tween = LK.import("@upit/tween.v1"); var storage = LK.import("@upit/storage.v1", { highScore: 0 }); /**** * Classes ****/ var Bullet = Container.expand(function () { var self = Container.call(this); var bulletGraphics = self.attachAsset('bullet', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 140; // Double the speed again for faster gameplay self.damage = 1; self.update = function () { // Auto-move player left and right self.y -= self.speed; // Auto-destroy bullets that go off screen if (self.y < -50) { self.destroy(); } }; return self; }); var Enemy = Container.expand(function () { var self = Container.call(this); var enemyGraphics = self.attachAsset('enemy', { anchorX: 0.5, anchorY: 0.5 }); self.health = 1; // Ensure enemy dies in one hit self.speed = 2 + Math.random() * 0.5; // Decrease enemy movement speed for slower gameplay self.value = 100; // score value self.canShoot = Math.random() < 0.3; // 30% of enemies can shoot self.lastShot = 0; self.fireRate = 2000 + Math.random() * 2000; // Random fire rate between 2-4 seconds // Create health bar self.healthBarBg = self.attachAsset('healthBarBg', { anchorX: 0.5, anchorY: 0.5, y: -70 }); self.healthBar = self.attachAsset('healthBar', { anchorX: 0.5, anchorY: 0.5, y: -70 }); self.updateHealthBar = function () { var healthPercentage = self.health / 2; // 2 is max health self.healthBar.scaleX = healthPercentage; }; self.damage = function (amount) { self.health -= amount; self.updateHealthBar(); // Flash enemy when hit LK.effects.flashObject(self, 0xffffff, 200); if (self.health <= 0) { // Create explosion var explosion = new Explosion(); explosion.x = self.x; explosion.y = self.y; game.addChild(explosion); // Add score LK.setScore(LK.getScore() + self.value); // Remove from array and destroy self.destroy(); } }; self.shoot = function () { // Create a single bullet var enemyBullet = new EnemyBullet(); enemyBullet.x = self.x; enemyBullet.y = self.y + 50; // Start below the enemy enemyBullet.speed = 4; // Set speed for the bullet game.addChild(enemyBullet); enemyBullets.push(enemyBullet); LK.getSound('enemyShoot').play(); }; self.update = function () { self.y += self.speed; // Remove evade behavior from enemies // Shooting logic if (self.canShoot) { var now = Date.now(); if (now - self.lastShot > self.fireRate) { self.lastShot = now; self.shoot(); } } // Destroy if off screen if (self.y > 2732 + 100) { self.destroy(); gameActive = false; updateHighScore(); LK.showGameOver(); } }; return self; }); var EnemyBullet = Container.expand(function () { var self = Container.call(this); var bulletGraphics = self.attachAsset('enemyBullet', { anchorX: 0.5, anchorY: 0.5 }); self.speed = 4; // Lower enemy bullet speed for less challenging gameplay self.damage = 5; // Increase enemy bullet damage self.update = function () { self.y += self.speed; // Auto-destroy bullets that go off screen if (self.y > 2732 + 50) { self.destroy(); } }; return self; }); var Explosion = Container.expand(function () { var self = Container.call(this); var explosionGraphics = self.attachAsset('explosion', { anchorX: 0.5, anchorY: 0.5, scaleX: 0.5, scaleY: 0.5 }); // Play explosion sound LK.getSound('explosion').play(); // Animate explosion tween(explosionGraphics, { scaleX: 2, scaleY: 2, alpha: 0 }, { duration: 500, easing: tween.easeOut, onFinish: function onFinish() { self.destroy(); } }); return self; }); var Player = Container.expand(function () { var self = Container.call(this); var playerGraphics = self.attachAsset('player', { anchorX: 0.5, anchorY: 0.5 }); self.maxHealth = 3; self.health = self.maxHealth; self.fireRate = 500; // Fire rate set to 0.5 seconds per shot self.lastShot = 0; self.speed = 20; self.invulnerable = false; // Create health bar self.healthBarBg = self.attachAsset('healthBarBg', { anchorX: 0.5, anchorY: 0.5, y: -80 }); self.healthBar = self.attachAsset('healthBar', { anchorX: 0.5, anchorY: 0.5, y: -80 }); self.updateHealthBar = function () { var healthPercentage = self.health / self.maxHealth; self.healthBar.scaleX = healthPercentage; }; self.damage = function (amount) { if (self.invulnerable) { return; } self.health -= amount; self.updateHealthBar(); LK.getSound('playerHit').play(); // Flash player when hit self.invulnerable = true; LK.effects.flashObject(self, 0xff0000, 1000); LK.setTimeout(function () { self.invulnerable = false; }, 1000); if (self.health <= 0) { // Create explosion var explosion = new Explosion(); explosion.x = self.x; explosion.y = self.y; game.addChild(explosion); // Game over LK.setTimeout(function () { LK.showGameOver(); }, 1000); self.visible = false; } }; self.shoot = function () { var now = Date.now(); if (now - self.lastShot < self.fireRate) { return; } self.lastShot = now; // Create twin bullets var bulletLeft = new Bullet(); var bulletRight = new Bullet(); // Position bullets slightly apart bulletLeft.x = self.x - 20; bulletRight.x = self.x + 20; bulletLeft.y = self.y - 50; bulletRight.y = self.y - 50; // Add bullets to the game game.addChild(bulletLeft); game.addChild(bulletRight); // Add to game's bullets array bullets.push(bulletLeft); bullets.push(bulletRight); LK.getSound('playerShoot').play(); }; self.down = function (x, y, obj) { self.shoot(); // Trigger shooting when player is touched }; self.update = function () { // Manual player movement control if (gameActive) { // Movement logic will be handled in game.move // Automatically fire bullets every 60 ticks (1 second at 60 FPS) if (LK.ticks % 60 === 0) { self.shoot(); } } }; return self; }); /**** * Initialize Game ****/ var game = new LK.Game({ backgroundColor: 0x000000 }); /**** * Game Code ****/ var background = LK.getAsset('nightSky', { anchorX: 0.5, anchorY: 0.5, x: 2048 / 2, y: 2732 / 2 }); game.addChild(background); // Game variables var player; var bullets = []; var enemyBullets = []; var enemies = []; var powerUps = []; var waveNumber = 1; var enemiesInWave = 5 + waveNumber * 2; var lastEnemySpawn = 0; var enemySpawnRate = 2000; // Increase to 2 seconds between spawns for stability var waveDelay = 5000; // 5 seconds between waves var gameActive = true; var dragActive = false; // Setup GUI var waveTxt = new Text2('WAVE 1', { size: 80, fill: 0xFFFFFF }); waveTxt.anchor.set(0.5, 0); LK.gui.top.addChild(waveTxt); waveTxt.y = 50; // Initialize player player = new Player(); player.x = 2048 / 2; player.y = 2732 - 300; player.updateHealthBar(); game.addChild(player); // Start background music LK.playMusic('bgMusic', { fade: { start: 0, end: 0.6, duration: 1000 } }); // Touch/mouse handling var lastTapTime = 0; game.down = function (x, y, obj) { if (!gameActive) { return; } var currentTime = Date.now(); if (currentTime - lastTapTime < 300) { // Double-tap detected within 300ms player.speed = 20; // Resume player movement } lastTapTime = currentTime; if (gameActive) { player.shoot(); // Shoot when tapping } }; game.move = function (x, y, obj) { if (!gameActive || !player.visible) { return; } // Constrain player to game area if (x > 100 && x < 2048 - 100) { player.x = x; } if (y > 100 && y < 2732 - 100) { player.y = y; } }; game.up = function (x, y, obj) { dragActive = false; }; // Spawn enemies for current wave function spawnWave() { if (waveNumber > 100) { gameActive = false; updateHighScore(); LK.showYouWin(); return; } enemiesInWave = 3 + waveNumber; // Further reduce the number of enemies per wave for less frequent enemy appearances waveTxt.setText('WAVE ' + waveNumber); // Show wave notification waveTxt.alpha = 1; tween(waveTxt, { alpha: 0 }, { duration: 2000, easing: tween.easeOut }); // Slightly increase enemy spawn rate with each wave enemySpawnRate = Math.max(1000, 1500 - waveNumber * 50); } // Spawn a single enemy function spawnEnemy() { var enemy = new Enemy(); enemy.x = Math.random() * (2048 - 200) + 100; // Random position between 100 and (2048-100) enemy.y = -100; // Start above the screen enemy.updateHealthBar(); // Increase enemy health every few waves if (waveNumber > 3) { enemy.health += Math.floor(waveNumber / 3); enemy.updateHealthBar(); } // Increase enemy speed slightly with each wave enemy.speed += waveNumber * 0.1; game.addChild(enemy); enemies.push(enemy); enemiesInWave--; // Decrease the count of enemies to spawn in the current wave // Trigger automatic bullet release when an enemy appears player.shoot(); } // Save the high score if needed function updateHighScore() { var currentScore = LK.getScore(); if (currentScore > storage.highScore) { storage.highScore = currentScore; } } // Main game update loop game.update = function () { if (!gameActive) { return; } // Enemy spawning logic var now = Date.now(); if (enemies.length < enemiesInWave && now - lastEnemySpawn > enemySpawnRate) { lastEnemySpawn = now; spawnEnemy(); } // Wave transition logic if (enemies.length === 0 && enemiesInWave <= 0) { waveNumber++; if (waveNumber <= 100) { // Start next wave after delay LK.setTimeout(function () { spawnWave(); }, waveDelay); enemiesInWave = 5 + waveNumber * 2; // Reset for next wave } else { gameActive = false; updateHighScore(); LK.showYouWin(); } } // Bullet collision detection for (var i = bullets.length - 1; i >= 0; i--) { var bullet = bullets[i]; // Check collision with each enemy for (var j = enemies.length - 1; j >= 0; j--) { var enemy = enemies[j]; if (bullet.intersects(enemy)) { // Damage enemy enemy.damage(bullet.damage); // Remove bullet bullet.destroy(); bullets.splice(i, 1); // If enemy is destroyed, remove from array if (enemy.health <= 0) { enemies.splice(j, 1); enemiesInWave--; } break; // This bullet hit something, stop checking } } } // Enemy bullet collision with player if (player.visible) { for (var i = enemyBullets.length - 1; i >= 0; i--) { var bullet = enemyBullets[i]; if (bullet.intersects(player)) { // Damage player player.damage(bullet.damage); // Remove bullet bullet.destroy(); enemyBullets.splice(i, 1); // Check if game over if (player.health <= 0) { gameActive = false; updateHighScore(); } } // Check collision with player bullets for (var j = bullets.length - 1; j >= 0; j--) { var playerBullet = bullets[j]; if (bullet.intersects(playerBullet)) { // Create explosion at the collision point var explosion = new Explosion(); explosion.x = bullet.x; explosion.y = bullet.y; game.addChild(explosion); // Destroy both bullets bullet.destroy(); enemyBullets.splice(i, 1); playerBullet.destroy(); bullets.splice(j, 1); // Display score bar var scoreBar = new Text2('Score: ' + LK.getScore(), { size: 50, fill: 0xFFFFFF }); scoreBar.anchor.set(0.5, 0); scoreBar.x = 2048 / 2; scoreBar.y = 100; game.addChild(scoreBar); LK.setTimeout(function () { scoreBar.destroy(); }, 2000); // Display for 2 seconds break; // Stop checking this bullet } } } // Enemy collision with player for (var i = enemies.length - 1; i >= 0; i--) { var enemy = enemies[i]; if (enemy.intersects(player)) { // Damage player player.damage(1); // Damage enemy enemy.damage(1); // If enemy is destroyed, remove from array if (enemy.health <= 0) { enemies.splice(i, 1); enemiesInWave--; } // Check if game over if (player.health <= 0) { gameActive = false; updateHighScore(); } } } } // Clean up arrays (remove destroyed objects) bullets = bullets.filter(function (bullet) { return bullet.parent !== null; }); enemyBullets = enemyBullets.filter(function (bullet) { return bullet.parent !== null; }); enemies = enemies.filter(function (enemy) { return enemy.parent !== null; }); powerUps = powerUps.filter(function (powerUp) { return powerUp.parent !== null; }); }; // Start the first wave spawnWave();